US10924705B1ActiveUtility

Serrated prism exit aperture for managing projection flare artifacts

63
Assignee: CHRISTIE DIGITAL SYSTEMS USAPriority: Dec 31, 2019Filed: Dec 31, 2019Granted: Feb 16, 2021
Est. expiryDec 31, 2039(~13.5 yrs left)· nominal 20-yr term from priority
Inventors:Mark LammJoseph Ma
G03B 21/14G03B 21/28G03B 21/147H04N 9/3105G03B 21/008G02B 27/14G02B 5/04H04N 9/3141G02B 5/005G02B 26/0833G03B 21/142H04N 5/7458
63
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Cited by
9
References
3
Claims

Abstract

An exit aperture is set forth for placement between a prism and a projection lens capable of projecting light on a screen, comprising a frame with an opening for passing a cone of light and mounting points for securing the frame relative to the projection lens, wherein the opening has serrated edges for diffracting light incident thereon in multiple directions perpendicular to the serrated edges so as to be imperceptible when projected on the screen.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
       1. An exit aperture for placement between a prism and a projection lens capable of projecting light on a screen, the exit aperture comprising a frame with an opening for passing a cone of light and mounting points for securing the frame relative to the projection lens, wherein the opening has serrated edges for diffracting light incident thereon in multiple directions perpendicular to the serrated edges so as to be imperceptible when projected on said screen. 
     
     
       2. The exit aperture of  claim 1 , wherein the frame is opaque for blocking stray light. 
     
     
       3. The exit aperture of  claim 1 , wherein the frame is fabricated from sheet metal.

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